Buchi 535 - Page 38

12.
Troubleshooting
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t
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37
Problem
Possible cause Solution
Instrument not working at all
1.No current
1. Check mains voltage
2.Fuse F1/F7 defective
2. Change fuse
Stirrer and illumination working,
1.Fuse F2, F3or F4 defective
1. Change fuse F2, F3 or F4
heating not working
2.Heating coil defective 2. Replace heating coil
(see Section 11.5.)
3.Electronics defective
3. Call Service Engineer
4.Pt-100 defective
4. Call Service Engineer
Illumination not working 1.Lamps defective
1. Change lamps (see Section 11.6)
2.Fuse F6 defective
2. Change fuse
3.Plug X4 not connected to PCS
3. Connect plug to PCS
Stirrer not working,
Stirrer motor defective
Call Service Engineer
heating working
Fan not working
1.Fuse F6 defective
1. Change fuse
2.Fan defective
2. Replace fan (see Section 11.4)
3.Plug X4 not connected to PCS
3. Connect plug to PCS
Set value incorrect
Call Service Engineer
Temperature heating rate incorrect
Call Service Engineer
Stirrer and heating not working
1.Cable 16 not connected 1. Connect cable
2.0verheating safety switch
2. Allow instrument to cool
has come into operation
Digital display not working
1. Flat cable not connected
1. Conect cable X5 OrX7 (see Section
10.1.)
2. Digital display PCS defective
2. Replace PCS (see Section 11.7.)
3. Fuse F5 defective
3. Change fuse F5
Flashing error code (000/399) appears
1. Cable 17 not connected
1. Connect cable
on digital display
2. Pt-1QOdefective
2. Call Service Engineer
Incomplete information shown
LED defective
Replace PCS (see Section 11.7.)
on digital display
Different values obtained from
1. Oil to viscous
1. Change oil (See Section 9.2.)
digital display and thermometer
2. Thermometer imprecise
2. Use calibrated thermometer
3. Electronics disadjusted
3. Call Service Engineer
Temperatur not stable
Circulation of the oil is
1. Adjust stirrer in the heating vessel
(Indication raises and dropps)
not sufficient
2. Change oil (viscosity too high)